how to tell if ur slave cylinder is bad? - JeepForum.com
 
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post #1 of 10 Old 10-29-2007, 05:34 PM Thread Starter
Spigger73
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how to tell if ur slave cylinder is bad?

ok so im done with my swap well one thing is holding me back...The slave cylinder i was wondering how can u tell if its bad i've been bleeding it for a day now and i cant get any pressure i dont see any leaks from the master cylinder i check the firewall on the inside and on the outside no leaks from there so it has to be slave right? or can i just cut the line and try to put a hose instead of the line? to see if its the line...Thank you


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post #2 of 10 Old 10-29-2007, 07:18 PM
Big-n-Broke-YJ
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are you losing fluid or are you simply NOT getting any line pressure after bleeding it?

sounds like a bad master cylinder. usually the slave cylinder will leak when it fails.... although this is also usually true with the master cylinder, there are exceptions....

what does the pedal do when you press it to the floor? does it come back up?

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post #3 of 10 Old 10-29-2007, 08:07 PM Thread Starter
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the slave doesnt leak and neither does the master the pedal does come back up but i think it might just be the spring pulling it up and there no pressure at all.

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post #4 of 10 Old 10-30-2007, 10:26 AM Thread Starter
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plz help

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post #5 of 10 Old 11-01-2007, 04:10 PM Thread Starter
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one laszt question will a 87 clutch master cylinder work with a 94 slave cylinder??

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post #6 of 10 Old 01-26-2008, 02:25 PM Thread Starter
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bump

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post #7 of 10 Old 01-26-2008, 07:31 PM
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Well if you have blead it out sounds like a bad master cyl. When I did the swap from internal to external slave I used everything from a 95 so it was all the same. Should it work I would think yes. I mean a master cyl is a master cyl. On thing to try is put a piece of clear hose on the bleader valve and run it into a clear bottle of fluid. Crack the bleeder and pump the pedal and see if you are getting any bubbles out. Make sure the hose you use in submerged in fluid though. If you are getting bubbles then you need to keep adding fluid and pumping it through till there are no more bubbles. If the bubbles do not stop then you are sucking air somewhere and it will never bleed out right. I have been through a lot of interal slaves before the swap to external so I got pretty good at this.....lol. Good luck. Oh one more thing. If you get a 94 slave you will have to do some filing of the holes to get it fit the 87 bolt patern. Just a heads up for ya.

Lee

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post #8 of 10 Old 01-26-2008, 07:54 PM
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Since air will rise I think if you take the cap off the master and slowly push the pedal down and let it back slow a few times it might purge the air.
Quote:
Originally Posted by leedurr
Well if you have blead it out sounds like a bad master cyl. When I did the swap from internal to external slave I used everything from a 95 so it was all the same. Should it work I would think yes. I mean a master cyl is a master cyl. On thing to try is put a piece of clear hose on the bleader valve and run it into a clear bottle of fluid. Crack the bleeder and pump the pedal and see if you are getting any bubbles out. Make sure the hose you use in submerged in fluid though. If you are getting bubbles then you need to keep adding fluid and pumping it through till there are no more bubbles. If the bubbles do not stop then you are sucking air somewhere and it will never bleed out right. I have been through a lot of interal slaves before the swap to external so I got pretty good at this.....lol. Good luck. Oh one more thing. If you get a 94 slave you will have to do some filing of the holes to get it fit the 87 bolt patern. Just a heads up for ya.
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post #9 of 10 Old 01-27-2008, 06:14 AM
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check the rubber hose on the line, a friend went through the same problem, turned out the old hose was expanding. also, a vacum bleeder works great for getting all the air out easily.
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post #10 of 10 Old 01-27-2008, 06:14 PM
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Quote:
Since air will rise I think if you take the cap off the master and slowly push the pedal down and let it back slow a few times it might purge the air.
Yes you can do it this way to. Like was stated though pump slowy or you will have ahuge mess.....lol. I do it the other way since I can use my hand to press the pedal and watch the fluid for bubbles. basicly it is a one person bleader. I forgot though some of the new slaves fopr the 94 and newer don't even have a bleader valve so you have to do it the way PAT8942 stated.

Lee

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